What is the concept of air cryogenic plasma, there are no air cryogenic plasma generation tubes on t

It refers to the low-temperature plasma produced by breaking down air discharge. Plasma is divided into low temperature and high temperature, low temperature plasma refers to a temperature close to normal temperature, and the temperature of high temperature plasma is much higher than normal temperature (for example, the sun can be regarded as a mass of high temperature plasma). The general method of generating plasma at atmospheric pressure is to produce plasma by breaking down gas discharges at high voltages.

The medium between the discharge electrodes is generally gas, commonly used is HE, AR, and also uses air, the breakdown voltage of air is higher than that of nitrogen and argon, and it is more difficult to generate plasma through discharge (higher voltage is required). The practical application of plasma is relatively rare on the market at present. But the method of generating ozone by discharging air has a very long history.

The ozone generator upstairs should be the air cryogenic plasma generator.

The ozone generators on the market today belong to what you call air cryogenic plasma. It is generally used for sterilization.

At atmospheric pressure, there is no simple way to accurately measure density, and some measurement methods based on charge flow can only give particle flux, not particle density, but can also qualitatively indicate the density level, which has certain guiding significance for disinfection treatment.

It's similar to high-voltage static electricity. 15kV voltage, I don't know how much frequency.

Refer to low-temperature plasma smoke removal.

Hello landlord, according to the questions you raised, the following will be answered in detail for you:

Plasma, also known as plasma, is an ionized gaseous substance composed of positive and negative ions produced by atoms and atomic clusters after partial electron deprivation. Plasma, which can be divided into two types, high-temperature plasma and low-temperature plasma, is a good conductor of electricity that can trap, move, and accelerate plasma using a cleverly designed magnetic field. So do you know what is the difference between high-temperature plasma and low-temperature plasma?

How to distinguish between high temperature and low temperature plasma?

The difference between high-temperature plasma and low-temperature plasma

According to the plasma flame temperature:

1) High-temperature plasma: a plasma with a temperature equivalent to 108 109 K fully ionized, such as the sun, controlled thermonuclear fusion plasma.

2) Low temperature plasma: Hot plasma: dense high pressure (above 1 atmosphere), temperature 103 105K, such as arc, high frequency and combustion plasma.

How to distinguish between high-temperature plasma and low-temperature plasma

High-temperature plasma: Plasma above 1000C is called high-temperature plasma, which provides heat to the substance so that it reaches a sufficient temperature, and the irregular thermal movement of the particles inside the substance will be enhanced. When the kinetic energy of a charged particle increases to a certain extent, it will break free from the constraints of the electrostatic force and become a particle that can move freely, and the matter will rotate as well.

into high-temperature plasma. Matter above the universe (such as the sun) is in a high-temperature plasma state.

Low-temperature plasma state: Plasma below 1000cc is called low-temperature plasma. Cold plasma can be further divided into low-temperature plasma.

Under the action of the electric field, the particles with different electrical properties in the high-temperature plasma material will be subjected to the electric field force in the opposite direction, and the electric field is very strong, and the positive and negative particles can no longer gather in one place, and Z becomes freely moving ions, and the matter also transforms into a plasma state. Since this mass conversion can be completed at room temperature without high temperature, it is called low-temperature plasma.

Hope it helps!

<>1. The so-called plasma is to be excited to ionize the gas, reach a certain degree of ionization (sail posture 10 x), the gas is in a conductive state, and the ionized gas in this state shows collective behavior, that is, the movement of each charged particle in the ionized gas will affect the charged particles around it, and it is also constrained by other charged particles. Since the overall behavior of the ionized gas is electrically neutral, that is, the number of positive and negative charges in the ionized gas is equal, this gas state is called the isoionized manuscript absolute body state. Because its unique behavior is different from that of solid, liquid, and gaseous states, it is called the fourth state of matter.

2. The study of plasma is a discipline that explores and reveals the properties, characteristics and operation laws of the "fourth state" of matter in the plasma state. The research on plasma is mainly divided into two aspects: high-temperature and low-temperature plasma.

Low-temperature plasma is generally used to treat VOC organic waste gas, which is the use of high-energy electrons and ions generated during high-voltage discharge to decompose waste gas molecules. At the same time, high-energy electrons break down the oxygen molecule into two oxygen atoms and combine with the oxygen molecule again to form ozone. Ozone is a strong oxidizing agent that can oxidize organic pollutants.

Water molecules are decomposed into hydroxyl radicals when bombarded, which are also strong oxidants and can also oxidize organic matter.

1. In the process of plasma generation, the instantaneous high energy generated by high-frequency discharge can open the chemical energy of some harmful gas molecules, such as: ammonia, trimethylamine, hydrogen sulfide, methyl sulfide, methyl mercaptan, methyl sulfide, dimethyl disulfide, carbon disulfide and styrene, sulfide H2S, VOCs, benzene, toluene, xylene, the molecular chain structure of organic or inorganic polymer odorous compounds is decomposed into elemental atoms or harmless molecules;

2. The plasma contains a large number of high-energy electrons, positive and negative ions, excited particles and free radicals with strong oxidizing properties, which collide and combine with some exhaust gas molecules, and the exhaust gas molecules are in an excited state under the action of electric field.

When the energy obtained by the exhaust gas molecule is greater than the binding energy of its molecular bond energy, the molecular bond of the exhaust gas molecule is broken and directly decomposed into elemental atoms or harmless gas molecules composed of a single atom.

At the same time, a large number of active free radicals such as OH, Ho2, O and O3 with strong oxidation are produced, which can react chemically with harmful gas molecules, and finally form harmless products of rotten wax;

3. The physical action is manifested in the charge of dust collection. A large number of electrons in the plasma collide inelastically with the particle pollutants and adhere to their surfaces to make them charged, and the particle pollutants are collected by the dust collector under the action of the electric field.

4. The biological function is manifested in the effect of disinfection and sterilization. The mechanism is as follows: the positive and negative particles in the plasma make the electrical energy shear force generated on the surface of the microbial greater than the surface tension of the cell membrane, resulting in the destruction of the cell membrane and the death of the microorganism.

Plasma is divided into high-temperature plasma and low-temperature plasma. High-temperature plasma refers to the temperature equilibrium of all components at 2000-4000 K. At such high temperatures, the polymer material itself can be severely damaged.

In the low-temperature plasma system, the electron temperature is only higher than the temperature of ions and neutrons, the temperature of heavy particles is not high, and the low-temperature plasma only acts on a few nanometers of the surface of the material, which will not cause damage to the polymer material matrix, so it is suitable for material surface modification.

Low-temperature plasma treatment will introduce a large number of functional groups on the surface of polymer materials, such as the formation of -OH and other groups on the surface of polymer materials by using various non-polymeric gases (O2, H2, Ar) to change the surface properties of polymer materials.

The low-temperature plasma surface treatment machine is a technical method that breaks down the inert gas (N2, O2, CO, etc.) molecules under the condition of using applied voltage, and introduces -OH, -NH2 and other groups, ions and atoms into the surface of the material, or directly generates free radicals on the surface of the material.

Newly introduced and newly generated free radicals can also be linked to some molecules on the surface of the material through chemical bonding, so that the polymer material can obtain new surface properties. Low-temperature plasma surface treatment methods are often used to improve the hydrophilicity and biocompatibility of the material surface, etc.

Low-temperature plasma technology has a wide range of applications, and the flow rate and concentration of gas are two very important factors for the application of gaseous pollutant treatment technology. Biofiltration and combustion technologies can be applied in the higher concentration range, but are limited by the flow rate of the gas. The low-temperature plasma technology has a wide range of applications for the flow rate and concentration of gases, and the wide application of low-temperature plasma equipment is self-evident.

Plasma technology is simple. The adsorption method should consider the regular replacement of the adsorbent, and there may be secondary pollution during desorption; The combustion method requires very high operating temperatures; Biological methods should strictly control conditions such as pH, temperature and humidity to be suitable for the growth of microorganisms. The low-temperature plasma technology overcomes the shortcomings of the above technologies, the reaction conditions are normal temperature and pressure, the reactor structure is simple, the low-temperature plasma equipment can eliminate mixed pollutants at the same time (in some cases, it also has a synergistic effect), and will not produce secondary pollution.

In terms of economic feasibility, the low-temperature plasma reaction device itself has a single and compact system composition, in terms of operating costs, microscopically speaking, because the discharge process only increases the electron temperature and the ion temperature remains basically unchanged, so that the reaction system can maintain low temperature, low-temperature plasma equipment not only has a high energy utilization rate, but also makes the equipment maintenance cost very low.

Low-temperature plasma technology has significant advantages in the treatment of gaseous pollutants. The basic principle is that under the acceleration of the electric field, high-energy electrons are generated, and when the average energy of the electrons exceeds the molecular chemical bond energy of the target treatment, the molecular bonds are broken to achieve the purpose of eliminating gaseous pollutants.

--Upulai Plasma Technology specializes in plasma research and development!

First of all, understand what plasma is:

Plasma is a form of matter composed of free electrons and charged ions, which is widely found in the universe and is often regarded as the fourth state of matter.

Plasma is a gas mass with high kinetic energy, the total charged charge of the plasma is still neutral, and the electrons in the outer layer are knocked out by the high kinetic energy of the electric field or magnetic field, and the electrons are no longer bound to the nucleus, but become free electrons with high high kinetic energy.

Then, there are 2 classifications of plasma:

Although the electron temperature is very high during the discharge process of low-temperature plasma, the temperature of the heavy particles is very low, and the whole system presents a low-temperature state, so it is called low-temperature plasma, also called non-equilibrium plasma.

If the temperature of the electron is about the same as that of the heavy particle, it is a high-temperature plasma, or an equilibrium plasma.

When the temperature of plasma is below tens of thousands of degrees Celsius, it is called low-temperature plasma, and the temperature is hundreds of millions of dollars.

The so-called plasma is the gas that is excited to ionize the gas and reach a certain degree of ionization (10x) at the gas.

In the conductive state, the ionized gas in this state exhibits a collective behavior, i.e., each charge in the ionized gas.

The motion of a particle affects the charged particles around it, and it is also constrained by other charged particles. Composed.

The overall behavior of the ionized gas shows electric neutrality, that is, the number of positive and negative charges in the ionized gas is equal, which is called this.

The gas state is plasma. Because its unique behavior is completely different from that of solid, liquid, and gaseous states, it is called the fourth state of matter.

The study of plasma is to explore and reveal the properties and characteristics of the "fourth state" of matter in the plasma state.

and a discipline of the law of operation. The research on plasma is mainly divided into two aspects: high-temperature and low-temperature plasma.

The temperature of the particles in the high-temperature plasma is as high as tens of millions to hundreds of millions of degrees Celsius, so that the particles have enough energy.

collide to achieve a nuclear fusion reaction. The temperature of the particles in the low-temperature plasma can also reach thousands or even tens of thousands of degrees.

Dissociate molecules and atoms

Ionization, compounding, etc. It can be seen that the temperature of low-temperature plasma is not low, and the so-called low temperature is only relative to the high temperature of high-temperature plasma. High-temperature plasma is mainly used in controllable nuclei in the energy sector.

Fusion, low-temperature plasma, is used in many fields of science, technology and industry. Research of high-temperature plasma.

Half a century has passed, and it is now approaching the goal of fusion ignition; The research and response of low-temperature plasma.

It is only in recent years that it has shown strong vitality and is in a period of vigorous development.

The main applications of cryogenic plasma are:

Chemical vapor deposition.

Etching, cleaning.

Surface modification. The cold light source plasma is the fourth state of matter, which has a higher energy than the gaseous state, and the plasma is a good conductor and is affected by the magnetic field.

Microwave is one of the methods of plasma generation, microwave plasma has the advantages of no electrode, large volume, wide operating air pressure, low energy consumption, high efficiency and low cost, and its plasma generation chamber and treatment chamber can be separated and combined, and the process is flexible. Microwave plasma has advantages and characteristics that are difficult to match with other plasmas.

Plasma has a higher temperature and energy density than other processes, producing active ingredients that initiate physical and chemical reactions that are impossible or difficult to achieve under conventional conditions.

Advantages of the plasma process:

Dry cleaning process.

Meet harsh conditions such as clean rooms.

It is convenient and flexible to use, and the process is simple.

It has a significant processing effect on parts of various shapes.

The process conditions are fully controllable.

Low cost, good effect and short time.

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